Machine for making paper bags.



No. 787,759. PATENTED APR. 18, 1905 .0. HESSBR.

MACHINE FOR MAKING PAPER BAGS.

APPLIUATION FILED JUNE 24, 1904.

UNITED STATES Patented April 18, 1905.

OTTO HESSER, OF CANNSTATT, GERMANY.

MACHINE FOR MAKING PAPER BAGS- SPECIFIGATION forming part of Letters Patent No. 787,759, dated. April 18, 1905.

Application filed June 24:,1904- Serial No. 214,063.

facture of paper bags from single sheets previously cut to the required size.

The principal object of the invention is to provide a feeding or traversing mechanism by means of which the sheets are removed from a table and presented to a number of operating devices by which the bag is shaped and formed.

A further object of the invention is to provide a novel form of carrying mechanism whereby provision is made for compensating for the turning movement of an endless conveyer formed of a number of pivotally-Connected links.

-With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a side elevation, partly in section, of a carrier mechanism constructed in accordance with the invention. Fig. 2 is a transverse sectional elevation of a portion of the same drawn to an enlarged scale. Fig. 3 is an elevation of a number ofplates mounted on aportion of the' endless carrier. Fig. i is a sectional plan view of the same, and Fig. 5 is a sctional plan view of a portion of one of the hearings or supports of the endless carrier.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

In machines of the class forming the subject of the present invention it is usual to employ a slotted table in connection with a plurality of bag-forming plates that are secured to a revoluble disk or carrier and successively moved through the slot in the table, thereby to form a first fold in the sheet of paper, and toremove the same from the table.

In the device forming the subject of the present invention an endless carrier is substituted for the revoluble carrier in ordinary use, and provision is made for obtaining greater accuracy of movement and at the same time to avoid the necessity of transfers of a partlyfinished bag 'from the initial folding-plates to secondary plates or formers.

In the drawings, 1 indicates a frame from which rises a pair of standards 2, that are connected by a longitudinally-disposed plate 16, having rounded terminals 3 and 4: with bearings for the reception of two shafts 7 and 9, the outer ends of which are guided, respectively, in brackets 5 and 6, secured to the longitudinally-disposed plate 16, and on said shafts are secured rectangular plates 14: and 14, over which passes an endless carrier formed of a plurality of pivotally-connected links 8, each of the links being of a length approximately equal to the Width of one of the sides of the plate 14. The connecting-pins of the several links are laterally extended and form bearings for the support of antifrictionrollers 13, that are adapted to travel in a grooved trackway 12, which extends in a horizontal direction for the greater portion of its length and at the ends of the plate 16 is arranged on curved lines following generally the contour of the curved end portions 3 and 4 of said plate. To the links are attached formerplates 10, the plates being attached at regular intervals, generally to each link, and the connection is preferably of such nature that plates of one size and shape may be readily detached to permit the substitution of others in the manufacture of bags of different size. When one of the rollers 13 arrives at the juncture of the upper straight portion of the track and the curved portion of the track adjacent to the shaft 7, further movement will result in revolving of the plate lt around the shaft 7 as an axis, and the roller will travel around the curved portion of the trackway through an arc of ninety degrees, and at the next movement will travel through a second arc of ninety degrees, and the next movement through a third are of ninety degrees, when it will finally be in a position to enter the lower run of the straight portion of the grooved trackway. This arcuate movement would necessarily result in breakage and straining of the links unless provision is-made for the greater extent of movement that is necessary while the rollers are traveling in these arcuate lines, especially during the travel across the horizontal plane of the two shafts. In order to provide for this, the shaft 9 of the plate 14: is mounted in elongated bearing-openings which will permit the shaft to move in the direction of the shaft 7, and the curved guiding-groove 12, that is formed in the end L of the plate 16, is not part of a circle, but is elliptical in form,

its minor diameter being in the horizontal plane of the axis of shaft 9.

In the plate 14:, carried by the shaft 9, isa groove 15 square in contour, its side lines being arranged at angles of forty-five degrees to the edges of the plate. In this groove [its a pin or antifriction-roller 17, projecting from the plate 16, the pin being in the horizontal plane of the shafts 7 and 9 and between said shafts, so that the walls of the groove 15 exercise a cam-like effect in positively moving the plate 14 in the direction of the shaft 7 during the movementof the rollers 13 around the curved portions of the trackway.

In a construction of this kind it is possible to move the forming-plates in the proper direction to take up successive sheets of paper and to permit the traveling of the same along the length of the machine and to provide for intermittent movement, in order that the plates may be stopped in alinement with folding or other devices, which operate in connection with the plates for conveying the paper-blank.

A further advantage gained from this construction is that the former-plates may be stopped in proper position with respect to the operating devices employed in the manufacture of the bag, and as each stop occurs as the shaft 9 reaches the limit of its movement away from shaft 7 the link belt will be placed under some tension and the plates will be positively held in place.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device of the class specified, a frame having a groove, the intermediate portions of which are arranged-in parallel lines, and the end portions in curved lines in order to connect with the parallel portions, angular disks arranged at the curved ends, and a link belt passing over said angular disk and having rollers adapted to the groove.

2. In a device of the class specified, an endless carrier formed of a plurality of links having projecting pins or antifriction-rollers, a frame member having a continuous groove, portions of which are arranged in parallel relation, and other portions in curved lines, said groove receiving the antifriction rollers, shafts arranged within the area surrounded by the circular portions of the groove, rectangular plates mounted on said shafts and engaging the links, one of the shafts being movable toward and from the other, and formingplates carried by the conveyer.

3. In a device of the class specified, an endless conveyer formed of a plurality of pivotally-connected links, antifriction-rollers projecting from the links, apairof shafts of which one is movable toward and from the other, each of said shafts carrying an angular disk for engagement with the links of the conveyer, and a frame having a continuous groove extending partlyin parallel lines, the connecting portions of the grooves being curved around the shafts.

4. The combination with a grooved frameplate, of a pair of shafts, one of which is movable toward and from the other, rectangular disks mounted on the shafts, one of said disks being provided with a cam-groove, a stationary pin engaging said cam-groove, said frameplate being further provided with a continuous groove extending in curved lines around the shafts and having parallel portions connecting the curved portions of the groove, an endless conveyer formed of links extending around the rectangular disks, antifriction-rollers projecting from the links, and entering the groove, and forming-plates carried by said links.

In testimony whereofI affix my signature in presence of two witnesses.

OTTO HESSER.

Witnesses AUGUST DRAUTZ, WALTER SoHwAEBsoH. 

